diff --git a/.gitignore b/.gitignore
index 596783b..d9b9b84 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,6 @@ modules/firmware/*
 
 # vim swap files
 *.swp
+
+# Local scratch project, not part of this flake.
+tf-inspect/